Autochthonous self-assembly of nature's nanomaterials: green, parsimonious and antibacterial carbon nanofilms on glass

Abstract

The development of thin film coatings has been a very important development in materials science for the modification of native material surface properties. Thin film coatings are enabled through the use of sophisticated instruments and technologies that demand expertise and huge initial and running costs. Nano-thin films are yet a furtherance of thin films which require more expertise and much more sophistication. In this work for the first time we present a one-pot straightforward carbon thin film coating methodology for glass substrates. There is novelty in every single aspect of the method, with the carbon used in the nanofilm being obtained from turmeric soot, the coating technique consisting of a basic immersion technique, a dip-dry method, in combination with the phytosoot-derived carbon's inherent ability to self-assemble to form a uniform and continuous stable coating. The carbon nanofilm has been characterized using field emission scanning electron microscopy (FESEM), Energy Dispersive X-ray (EDAX) analysis, a goniometer and X-ray diffraction (XRD). This study for the first time opens a new school of thought of using such naturally available free nanomaterials as eco-friendly green coatings. The amorphous porous carbon film can be coated on any hydrophilic substrate and is not substrate specific. Its added advantages of being transparent and antibacterial in spite of being green and parsimonious are meant to realize its utility as ideal choices for solar panels, medical implants and other construction applications.

Extraction of carbon nanodots from benzoin resin soot for multifaceted antibacterial applications

“…The use of isolated carbon nanodots from turmeric smoke to form coatings on glass has been demonstrated previously by our group [10]. The results of the antibio lm coatings formed from a rather simple dip and dry technique con rmed that the smoke extracted carbon nanodots could result in costeffective antibio lm coatings.…”

“…Figure 2 SEM micrographs con rmed the presence of 10-24nm sized BRS-CNDs. Earlier reports [10,11] also document the successful extraction of CNDs from soot as well.…”

Extraction and characterization of antibacterial and antibiofilm Carbon nanodots from Havan smoke

“…The slides were retrieved and gently washed to remove the loosely adhering bio lm. Then the glass slides were ooded with 0.1% acridine orange and incubated for 2 min [17]. Then the excess stain was washed off and the slides were air dried.…”

A Fumigation-Based Surface Sterilization Approach for Plant Tissue Culture

“…As observed from the results, it was found that fumigation of the explants and pretreatment of the explants in carbon soot solution resulted in excellent surface sterilization. Judy et al, (2016) recently reported the self-assembly of the soot-derived carbon dots onto substrates exposed to them [45]. It is a certain possibility that the carbon coated the explants when immersed in the soot solution and exposed to fumes.…”